Pub Date : 2018-08-01DOI: 10.1109/EPEPEMC.2018.8521864
R. Kiran, M. Bhaskar, Sanjeevikumar Padmanaban, F. Blaabjerg, P. Wheeler, M. Rashid
In the present scenario of increasing power demand and depletion of fossil fuel results in the research advancements in the field of renewable energy sources. Among various types of renewable energy sources, photovoltaic related applications are gaining importance. DC-AC converters play a very prominent role in photovoltaic system in efficient power delivering for various applications. This paper proposed a 7-level inverter with reduced number of switches for photovoltaic applications. Unipolar Single Reference Multicarrier Sinusoidal Pulse Width Modulation (U-SR-MC-SPWM) technique is used for the purpose of gate pulse generation for the proposed multilevel inverter. A comparative study of seven-level cascaded multilevel inverter and a proposed multilevel inverter is carried out. Simulation and power quality analyses of both multilevel inverters are performed in MATLAB/Simulink platform version 2016(a). It is noticed that the total harmonic distortion is slightly more of the proposed multilevel inverter when compared with cascaded h-bridge inverter. But, with the reduction in the number of power semiconductor switches in proposed multilevel inverter overall switching power losses, circuit complexity, gate driver requirements and cost of the system can be reduced. The simulation results always show a good agreement with the proposed approach.
{"title":"Unipolar Single Reference Multicarrier Sinusoidal Pulse Width Modulation Based 7-level Inverter with Reduced Number of Semiconductor Switches for Renewable Energy Applications","authors":"R. Kiran, M. Bhaskar, Sanjeevikumar Padmanaban, F. Blaabjerg, P. Wheeler, M. Rashid","doi":"10.1109/EPEPEMC.2018.8521864","DOIUrl":"https://doi.org/10.1109/EPEPEMC.2018.8521864","url":null,"abstract":"In the present scenario of increasing power demand and depletion of fossil fuel results in the research advancements in the field of renewable energy sources. Among various types of renewable energy sources, photovoltaic related applications are gaining importance. DC-AC converters play a very prominent role in photovoltaic system in efficient power delivering for various applications. This paper proposed a 7-level inverter with reduced number of switches for photovoltaic applications. Unipolar Single Reference Multicarrier Sinusoidal Pulse Width Modulation (U-SR-MC-SPWM) technique is used for the purpose of gate pulse generation for the proposed multilevel inverter. A comparative study of seven-level cascaded multilevel inverter and a proposed multilevel inverter is carried out. Simulation and power quality analyses of both multilevel inverters are performed in MATLAB/Simulink platform version 2016(a). It is noticed that the total harmonic distortion is slightly more of the proposed multilevel inverter when compared with cascaded h-bridge inverter. But, with the reduction in the number of power semiconductor switches in proposed multilevel inverter overall switching power losses, circuit complexity, gate driver requirements and cost of the system can be reduced. The simulation results always show a good agreement with the proposed approach.","PeriodicalId":251046,"journal":{"name":"2018 IEEE 18th International Power Electronics and Motion Control Conference (PEMC)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127268215","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-08-01DOI: 10.1109/EPEPEMC.2018.8521922
F. Renken, Wensong Shen, Udo Schürmann, Ioana-Monica Pop-Calimanu
As part of the EU project SWARM, a fleet of fuel cell vehicles is built. In these contexts, a DC/DC converter will be developed, which will be placed between battery and fuel cell in the powertrain of these vehicles. A multiphase buck converter is selected, in order to reach the power of the fuel cell system and to reduce the filter effort. The filter circuit with different converter phase numbers is calculated. A practical realization of a six-phase buck converter is described. Measurements of phase current balancing and efficiency curves are shown. Then, a test bench is presented, in which the converter can be proven at real (driving) conditions. In this way, the best operation strategy of the converter for use in fuel cell vehicles can be found.
{"title":"Multiphase DC/DC Converter and its Use in the Powertrain of Fuel Cell Vehicles","authors":"F. Renken, Wensong Shen, Udo Schürmann, Ioana-Monica Pop-Calimanu","doi":"10.1109/EPEPEMC.2018.8521922","DOIUrl":"https://doi.org/10.1109/EPEPEMC.2018.8521922","url":null,"abstract":"As part of the EU project SWARM, a fleet of fuel cell vehicles is built. In these contexts, a DC/DC converter will be developed, which will be placed between battery and fuel cell in the powertrain of these vehicles. A multiphase buck converter is selected, in order to reach the power of the fuel cell system and to reduce the filter effort. The filter circuit with different converter phase numbers is calculated. A practical realization of a six-phase buck converter is described. Measurements of phase current balancing and efficiency curves are shown. Then, a test bench is presented, in which the converter can be proven at real (driving) conditions. In this way, the best operation strategy of the converter for use in fuel cell vehicles can be found.","PeriodicalId":251046,"journal":{"name":"2018 IEEE 18th International Power Electronics and Motion Control Conference (PEMC)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126031000","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-08-01DOI: 10.1109/EPEPEMC.2018.8521990
K. Chinmaya, G. Singh
This paper proposes a CuK converter based integrated battery charger for plug-in electric vehicles (PEVs), Proposed bidirectional DC/DC converter is capable of performing buck/boost function during all modes of vehicle operation. It operates as a power factor correction (PFC) converter during plug-in charging mode, and as conventional single stage inverting buck/boost converter in driving and regenerative braking modes. Selection of a wide range of battery voltages and adequate control over braking can be achieved with the proposed multi-functional converter. In addition, size, weight and cost of the charger are also reduced, as it involves minimum number of components compared to existing buck/boost converters used in chargers. The proposed converter is highly suitable for onboard charger of PEVs. Simulation are performed on MATLAB/Simulink environment and a laboratory prototype of the aforementioned converter has been built to validate its feasibility.
{"title":"A Multifunctional Integrated Onboard Battery Charger for Plug-in Electric Vehicles (PEVs)","authors":"K. Chinmaya, G. Singh","doi":"10.1109/EPEPEMC.2018.8521990","DOIUrl":"https://doi.org/10.1109/EPEPEMC.2018.8521990","url":null,"abstract":"This paper proposes a CuK converter based integrated battery charger for plug-in electric vehicles (PEVs), Proposed bidirectional DC/DC converter is capable of performing buck/boost function during all modes of vehicle operation. It operates as a power factor correction (PFC) converter during plug-in charging mode, and as conventional single stage inverting buck/boost converter in driving and regenerative braking modes. Selection of a wide range of battery voltages and adequate control over braking can be achieved with the proposed multi-functional converter. In addition, size, weight and cost of the charger are also reduced, as it involves minimum number of components compared to existing buck/boost converters used in chargers. The proposed converter is highly suitable for onboard charger of PEVs. Simulation are performed on MATLAB/Simulink environment and a laboratory prototype of the aforementioned converter has been built to validate its feasibility.","PeriodicalId":251046,"journal":{"name":"2018 IEEE 18th International Power Electronics and Motion Control Conference (PEMC)","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126042526","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-08-01DOI: 10.1109/EPEPEMC.2018.8521891
Aydın Boyar, E. Kabalci
A big majority of electricity energy is generated from naturel sources such as coal, petroleum etc. in all over the world. The reserve of this sources are decreasing. However, the demand of electricity is increasing day by day. The researchers head for alternative energy sources such as biomass, geothermal, marine energies, hydropower, wind and solar. The most important of these is the solar energy. The studies about solar energy are increased in recent years. This study deals with the design and analysis of different converter topologies which are two phase interleaved boost converter and flyback converter in terms of structure, efficiency. Each system is consists of a photovoltaic (PV) module, converter topology and Maximum Power Point Tracking (MPPT) algorithm. The MPPT algorithm is necessary to acquire maximum power from the PV module. The power capacity of each system is 295 W and the input voltage of converters are around 54 V. While the output voltage of two-phase interleaved boost converter is 232 V, the output voltage of flyback converter is 238 V. In this study, it is determined that the efficiency of flyback converter is better than the two-phase interleaved boost converter.
{"title":"Comparison of a Two-Phase Interleaved Boost Converter and Flyback Converter","authors":"Aydın Boyar, E. Kabalci","doi":"10.1109/EPEPEMC.2018.8521891","DOIUrl":"https://doi.org/10.1109/EPEPEMC.2018.8521891","url":null,"abstract":"A big majority of electricity energy is generated from naturel sources such as coal, petroleum etc. in all over the world. The reserve of this sources are decreasing. However, the demand of electricity is increasing day by day. The researchers head for alternative energy sources such as biomass, geothermal, marine energies, hydropower, wind and solar. The most important of these is the solar energy. The studies about solar energy are increased in recent years. This study deals with the design and analysis of different converter topologies which are two phase interleaved boost converter and flyback converter in terms of structure, efficiency. Each system is consists of a photovoltaic (PV) module, converter topology and Maximum Power Point Tracking (MPPT) algorithm. The MPPT algorithm is necessary to acquire maximum power from the PV module. The power capacity of each system is 295 W and the input voltage of converters are around 54 V. While the output voltage of two-phase interleaved boost converter is 232 V, the output voltage of flyback converter is 238 V. In this study, it is determined that the efficiency of flyback converter is better than the two-phase interleaved boost converter.","PeriodicalId":251046,"journal":{"name":"2018 IEEE 18th International Power Electronics and Motion Control Conference (PEMC)","volume":"382 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123598607","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-08-01DOI: 10.1109/EPEPEMC.2018.8521840
E. Kabalci, Hilal Irgan, Y. Kabalci
This study presents both a hybrid microgrid system design with renewable energy and their control methods, analysis result. This renewable energy resources (RES) consist of 33kW PVs, 100kW fuel cell stack and a 50kW wind turbine with permanent magnet synchronous generator (PMSG). PV plant includes the PV arrays and DC-DC boost converter. Fuel cell plant includes the fuel cell stacks and DC-DC boost converter. The wind energy plant contains the wind turbine, PMSG, uncontrolled rectifier and DC-DC boost converter. The boost converter connected to PV plant has been controlled by using incremental conductance maximum power point tracking algorithm (IC-MPPT A). Both the boost converters of the wind energy system and fuel cell system have been operated with PI controllers. The switching element of all boost converters is M OSFE T. The switching frequency for boost converters of the wind energy system and fuel cell system is 30 kHz and 50 kHz for boost converter connected PV array. The hybrid microgrid has been coupled on 1000V DC-bus bar. 400V/120 kV transformer and 120 kV, 50 Hz AC supply have been used to create the grid model. To convert from DC to AC, as the topology, full bridge inverter circuit has been used and IGBT has selected as the switching element. Phase locked loop (PLL) algorithm has been used as a control for the AC voltage generated at the inverter output to be the same phase, frequency and amplitude with the grid. The system has been operated under the various operating conditions such as wind speed and solar irradiation. And despite these variables, the desired results have been obtained from the system.
{"title":"Hybrid Microgrid System Design with Renewable Energy Sources","authors":"E. Kabalci, Hilal Irgan, Y. Kabalci","doi":"10.1109/EPEPEMC.2018.8521840","DOIUrl":"https://doi.org/10.1109/EPEPEMC.2018.8521840","url":null,"abstract":"This study presents both a hybrid microgrid system design with renewable energy and their control methods, analysis result. This renewable energy resources (RES) consist of 33kW PVs, 100kW fuel cell stack and a 50kW wind turbine with permanent magnet synchronous generator (PMSG). PV plant includes the PV arrays and DC-DC boost converter. Fuel cell plant includes the fuel cell stacks and DC-DC boost converter. The wind energy plant contains the wind turbine, PMSG, uncontrolled rectifier and DC-DC boost converter. The boost converter connected to PV plant has been controlled by using incremental conductance maximum power point tracking algorithm (IC-MPPT A). Both the boost converters of the wind energy system and fuel cell system have been operated with PI controllers. The switching element of all boost converters is M OSFE T. The switching frequency for boost converters of the wind energy system and fuel cell system is 30 kHz and 50 kHz for boost converter connected PV array. The hybrid microgrid has been coupled on 1000V DC-bus bar. 400V/120 kV transformer and 120 kV, 50 Hz AC supply have been used to create the grid model. To convert from DC to AC, as the topology, full bridge inverter circuit has been used and IGBT has selected as the switching element. Phase locked loop (PLL) algorithm has been used as a control for the AC voltage generated at the inverter output to be the same phase, frequency and amplitude with the grid. The system has been operated under the various operating conditions such as wind speed and solar irradiation. And despite these variables, the desired results have been obtained from the system.","PeriodicalId":251046,"journal":{"name":"2018 IEEE 18th International Power Electronics and Motion Control Conference (PEMC)","volume":"322 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122326810","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-08-01DOI: 10.1109/EPEPEMC.2018.8521945
Oğuzhan Öztoprak, A. Hava
This paper provides a compact and fundamental level power electronics laboratory experiment about capacitive loaded three single-phase full-bridge diode rectifiers. While the procedure of the experiment is simple, the experiment provides wide range of opportunities for comprehensive learning on the important aspects of power electronics. The nonlinear circuit behavior of the rectifier and performance characterization are demonstrated as the conventional experiments. Moreover, the influence of the power source impedance on the power quality, the type and size of filtering for harmonic reduction are demonstrated on the single-phase rectifier. Furthermore, the three-phase connection type of the rectifiers with the delta and Y connection are utilized for isolating the triplen and nontriplen harmonics. Thus, the converter generated harmonics are observed and a good comprehension of them is provided. The structured, step-by-step experiment has been applied in the undergraduate power electronics courses for several years and has been confirmed as an efficient method for teaching power electronics at fundamental level. The experimental setup is easy to implement in terms of hardware and operation and has overall low cost, such that it can be implemented in any power electronics laboratory around the world.
{"title":"A Basic Power Electronic Laboratory Experiment Allowing Comprehensive and Structured Learning: Multi-Phase Capacitive Loaded Full-Bridge Rectifier","authors":"Oğuzhan Öztoprak, A. Hava","doi":"10.1109/EPEPEMC.2018.8521945","DOIUrl":"https://doi.org/10.1109/EPEPEMC.2018.8521945","url":null,"abstract":"This paper provides a compact and fundamental level power electronics laboratory experiment about capacitive loaded three single-phase full-bridge diode rectifiers. While the procedure of the experiment is simple, the experiment provides wide range of opportunities for comprehensive learning on the important aspects of power electronics. The nonlinear circuit behavior of the rectifier and performance characterization are demonstrated as the conventional experiments. Moreover, the influence of the power source impedance on the power quality, the type and size of filtering for harmonic reduction are demonstrated on the single-phase rectifier. Furthermore, the three-phase connection type of the rectifiers with the delta and Y connection are utilized for isolating the triplen and nontriplen harmonics. Thus, the converter generated harmonics are observed and a good comprehension of them is provided. The structured, step-by-step experiment has been applied in the undergraduate power electronics courses for several years and has been confirmed as an efficient method for teaching power electronics at fundamental level. The experimental setup is easy to implement in terms of hardware and operation and has overall low cost, such that it can be implemented in any power electronics laboratory around the world.","PeriodicalId":251046,"journal":{"name":"2018 IEEE 18th International Power Electronics and Motion Control Conference (PEMC)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122708007","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-08-01DOI: 10.1109/EPEPEMC.2018.8521984
F. Maislinger, H. Ertl, G. Stojcic, Laura Siplika
In this paper, the filter performance of a wide-bandgap (WBG) three phase motor inverter with integrated sinusoidal output voltage LC filter is analyzed. To ensure a well damped system behaviour at low losses, an active damping scheme based on filter capacitor feedback is used. Unfortunately, the nonlinear DC-Bias dependent capacitance of the used ceramic capacitors (X7R is used to minimize filter volume) significantly affects the active damping. A symmetrical filter structure sufficiently reduces the capacitors voltage dependency. However, the paper shows that the symmetrical structure also causes negative effects in respective to the filters noise suppression performance. Modifications in the filter topology are reported and analyzed for reducing the impaired noise suppression. The proposed filter scheme finally results in a well damped system behaviour fulfilling established EMC standards according output noise demonstrated by experimental results of a 2 kW/400 V laboratory prototype.
{"title":"Performance of a Two-Stage Actively Damped LC Filter for GaN/SiC Motor Inverters","authors":"F. Maislinger, H. Ertl, G. Stojcic, Laura Siplika","doi":"10.1109/EPEPEMC.2018.8521984","DOIUrl":"https://doi.org/10.1109/EPEPEMC.2018.8521984","url":null,"abstract":"In this paper, the filter performance of a wide-bandgap (WBG) three phase motor inverter with integrated sinusoidal output voltage LC filter is analyzed. To ensure a well damped system behaviour at low losses, an active damping scheme based on filter capacitor feedback is used. Unfortunately, the nonlinear DC-Bias dependent capacitance of the used ceramic capacitors (X7R is used to minimize filter volume) significantly affects the active damping. A symmetrical filter structure sufficiently reduces the capacitors voltage dependency. However, the paper shows that the symmetrical structure also causes negative effects in respective to the filters noise suppression performance. Modifications in the filter topology are reported and analyzed for reducing the impaired noise suppression. The proposed filter scheme finally results in a well damped system behaviour fulfilling established EMC standards according output noise demonstrated by experimental results of a 2 kW/400 V laboratory prototype.","PeriodicalId":251046,"journal":{"name":"2018 IEEE 18th International Power Electronics and Motion Control Conference (PEMC)","volume":"82 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122147876","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-08-01DOI: 10.1109/EPEPEMC.2018.8521754
Farzad Farajizadeh, M. Vilathgamuwa, P. Jayathurathnage, G. Ledwich
In this paper, a new method for dynamic wireless power transfer is presented. It is proposed that to reduce the size and weight of the pickup which is fixed on the bottom side of the electric vehicle chassis, and to increase the efficiency, a multi transmitter wireless power transfer system driven by an expandable N-Legged Converter (NLC) can be used. Along with these features, a uniform transferred power and efficiency profiles, simplicity of the converter and its modulation method are other remarkable features of this method. To show the feasibility of the proposed method, magnetics of the system is simulated in Maxwell and the converter is modelled in MATLAB.
{"title":"Expandable N-Legged Converter for Dynamic Wireless Power Transfer","authors":"Farzad Farajizadeh, M. Vilathgamuwa, P. Jayathurathnage, G. Ledwich","doi":"10.1109/EPEPEMC.2018.8521754","DOIUrl":"https://doi.org/10.1109/EPEPEMC.2018.8521754","url":null,"abstract":"In this paper, a new method for dynamic wireless power transfer is presented. It is proposed that to reduce the size and weight of the pickup which is fixed on the bottom side of the electric vehicle chassis, and to increase the efficiency, a multi transmitter wireless power transfer system driven by an expandable N-Legged Converter (NLC) can be used. Along with these features, a uniform transferred power and efficiency profiles, simplicity of the converter and its modulation method are other remarkable features of this method. To show the feasibility of the proposed method, magnetics of the system is simulated in Maxwell and the converter is modelled in MATLAB.","PeriodicalId":251046,"journal":{"name":"2018 IEEE 18th International Power Electronics and Motion Control Conference (PEMC)","volume":"138 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128759521","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-08-01DOI: 10.1109/EPEPEMC.2018.8521906
I. Nicolae, P. Nicolae, G. Enache, Lucian-Cristian Scărlătescu
The paper deals with the evaluation of harmonic distortions appeared for different operating regimes in absorbed phase currents and supplying voltages. The electric quantities were acquired from the packages of electrolysis belonging to a Hydrogen based cooling system of a power plant generator. Long sets of data were acquired and analyzed in order to evaluate the harmonic spectra for different values of the absorbed currents. Another goal was to reveal possible influences of the type of connection to the main supplying bar (direct versus intermediated by UPS). The analysis of the harmonic spectra obtained in different operational contexts allowed for the proposing of a possible compensation solution, relying on hybrid filters. Simulations were made in order to estimate the results generated by passive filtering. As for the active filtering part, an extended study related to the evaluation of the reference currents by using the Stationary Wavelet Transform was made.
{"title":"Dealing with Distortions Affecting the Equipment for Hydrogen Generation in a Power Plant","authors":"I. Nicolae, P. Nicolae, G. Enache, Lucian-Cristian Scărlătescu","doi":"10.1109/EPEPEMC.2018.8521906","DOIUrl":"https://doi.org/10.1109/EPEPEMC.2018.8521906","url":null,"abstract":"The paper deals with the evaluation of harmonic distortions appeared for different operating regimes in absorbed phase currents and supplying voltages. The electric quantities were acquired from the packages of electrolysis belonging to a Hydrogen based cooling system of a power plant generator. Long sets of data were acquired and analyzed in order to evaluate the harmonic spectra for different values of the absorbed currents. Another goal was to reveal possible influences of the type of connection to the main supplying bar (direct versus intermediated by UPS). The analysis of the harmonic spectra obtained in different operational contexts allowed for the proposing of a possible compensation solution, relying on hybrid filters. Simulations were made in order to estimate the results generated by passive filtering. As for the active filtering part, an extended study related to the evaluation of the reference currents by using the Stationary Wavelet Transform was made.","PeriodicalId":251046,"journal":{"name":"2018 IEEE 18th International Power Electronics and Motion Control Conference (PEMC)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124594411","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-08-01DOI: 10.1109/epepemc.2018.8521951
J. Bauer, Ondrej Lincak, J. Kynčl
Important parameters of an induction motor drives include dynamics and efficiency. Both attributes are tightly associated with accurate acquisition of hardly measurable quantities such as magnetic flux (and its position) and motor torque. The mathematical model of the induction machine is used for calculation of these quantities. The model usually comprises of a set of differential equations, that have to be numerically solved inside drive's controller. Computation time requirement and accuracy of the resulting estimation are important parameters of the selected solver. For this purpose, Euler's method was usually used in engineering applications, but with increasing computational throughput of DSP, more complicated numerical methods can be applied too. This paper strives to compare Euler's method with 4thorder Runge-Kutta method.
{"title":"Different Approaches in Numerical Solution of Continuous Mathematical Models of Induction Machine","authors":"J. Bauer, Ondrej Lincak, J. Kynčl","doi":"10.1109/epepemc.2018.8521951","DOIUrl":"https://doi.org/10.1109/epepemc.2018.8521951","url":null,"abstract":"Important parameters of an induction motor drives include dynamics and efficiency. Both attributes are tightly associated with accurate acquisition of hardly measurable quantities such as magnetic flux (and its position) and motor torque. The mathematical model of the induction machine is used for calculation of these quantities. The model usually comprises of a set of differential equations, that have to be numerically solved inside drive's controller. Computation time requirement and accuracy of the resulting estimation are important parameters of the selected solver. For this purpose, Euler's method was usually used in engineering applications, but with increasing computational throughput of DSP, more complicated numerical methods can be applied too. This paper strives to compare Euler's method with 4thorder Runge-Kutta method.","PeriodicalId":251046,"journal":{"name":"2018 IEEE 18th International Power Electronics and Motion Control Conference (PEMC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130346020","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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